Improvement in burglar-alarms



M. S. BOLT. Burglar-Alarm.

No.198,337.- Patented Dec. 18,1877.

WITNE SES NVENTOR, Mm ykm'm'a 6. 3)?- @4 5 ?Me, d: 7 c v ATTORNEYS.

N. PETERS. PHOTn-LITHOGRAPAER. WASHINGTON. D c.

MARLIN s. BOLT, on

- PATENT QFFIGE.

ELMIRA, NEW YORK.

IMPROVEMENT IN BURGLAR-ALARMS.

Specification forming part of Letters Patent No. 198,337, dated December18, 1877; application filed September 29, 1877.

To all whom it may concern:

Be it known that I, MARLIN S. BOLT, of Elmira, in the county of Ohemungand State of New York, have invented a new and valuable Improvement inBurglar-Alarms; and I do hereby declare that the following is a full,

clear, and exact description of the construction and operation of thesame, reference being had to the annexed drawings, making a part of thisspecification, and to the letters and figures of reference markedthereon.

Figure 1 of the drawings is a plan view of my burglar-alarm. Fig. 2 is alongitudinal vertical sectional View 5 and Figs. 3, 4, 5, 6, and 7 aredetail views thereof.

The nature of my invention consists in the construction and arrangementof a portable burglar-alarm, as will be hereinafter more fully setforth.

The annexed drawing, to which reference is made, fully illustrates myinvention.

A represents a box or case, of any suitable "dimensions, provided with alid or cover, B,

hinged thereto, and fastened by a hook, lock and key, or any othersuitable fastening device.

1n the bottom of the box or case A, upon a stud, a, is fastened a bellor gong, G. .D represents a hammer for striking said bell, attached to apivoted arm, I), which is actuated by a spring, d, the arm passingthrough a guide-staple, c, to limit its movement. On the end of thehammer D is formed a hookshaped projection, h, which, when the hammer isdrawn back, is held by the lower end of a lever, G, pivoted to the backof the box A.

By raising this lever to a vertical position a tongue or lug, i, on itslower end engages with the hook h to hold the hammer drawn back, thelever being held by means hereinafter described, and when released ormoved in either direction the hammer is relieved from the lug i, and thespring 01 throws the hammer forcibly against the bell to sound thealarm.

In one corner of the box A, in a frame, E, is mounted a spool, H, aroundwhich is wound a cord or wire, m, one end thereof being fastened to thespool, and the other end provided with a ring, n.

The spool H is so arranged in its frame that there will be considerablefriction on the spool to prevent the cord or wire from unwinding withouta very considerable strain thereon.

To use this burglar-alarm, the box A is placed in any convenientposition in the room, the cord or wire m unwound and passed around theroom in such a manner as to cross all the windows and doors therein, andclose to the same, said cord or wire being suspended at proper intervalsby links I I, fastened by means of screws 19.

Where any acute angles occur of doors or windows, the link I issuspended by a springhook, J. The lever G is then raised, and the hammerdrawn back to be caught by the lug i on the lower end of the lever, whenthe ring a in the end of the cord or wire m is placed over the upper endof the lever, and the spool H turned, by means of a crank, until thetension of the cord or wire m will be equal to that of a spiral spring,L, connected to the lever, and thus hold the lever in an uprightposition.

It will readily be seen that any further strain upon the cord or wire,or any slacking of the same, will turn the lever on its pivot, and atonce release the hammer, which then sounds the alarm.

In the box or case A is formed a chamber or receptacle, A, for storingthe crank R, links I, and spring-hooks J.

In place of the links, I may use pulleys S, moimted upon pins projectingfrom metal straps P, as shown.

The entire apparatus, when closed, is small, and takes up but littleroom, so that it can be carried in a carpet-bag, valise, or even in thepocket.

What I claim as new, and desire to secure by Letters Patent, is-- 1. Ina burglar-alarm, the combination with the bell or gong G, of thespring-ham. mer D, provided with the hook h, and the lever G, providedwith the lug or projection In testimony that I claim the above I have'5, substantially as and for the purposes set hereunto subscribed myname in the presence forth. of two witnesses.

2. The combination of the hell 0, hammer D, lever G, with spring L, andthe cord or wire m, provided with the ring n, wound upon afriction-spool, H, suspended by links I, and Witnesses:

connected to the lever G, all substantially as L. D. HUBLBUT,

and for the purposes herein set forth. R. H. RANSOM.

MARLIN S. BOLT.

